Convert accidental member accesses into static function accesses

1. make it compile

Stop observer from crashing when it doesn't exist in preferences.xml

string class usage

add null check: should fix bug #1163241 (inkscape crashed with SIGSEGV in Inkscape::Preferences::_getNode())

Units: stop newing Unit objects. pass around pointers to "undeletable" Unit objects in the UnitTable. I think we should move to using indexed units, and pass around the index of the unit in the unittable, or smth like that... ?

Switched to global UnitTable.

A couple of forward declarations

Fix for 255792 : Calligraphy tool presets management

some memleak fixes (Bug #1043571)

revert rev 11646: build issue with dbus (forgot to adapt some more, dbus was not enabled) and other issues

converted some c-string usage to c++ string class usage: should fix some memory leaks

preferences read out: when no unit is specified, assume it is in the requested units

Removed use of 'void *' as attemtp to limit access to internals.

cppcheck: variable initialisation / fix possible memory leak

add new preference widget for a number with a unit. change Preferences > Steps to this new widget

Doc comment cleanup of '@brief'.

Cleaned up memory patch. Fixes bug #737298.

Super duper mega (fun!) commit: replaced encoding=utf-8 with fileencoding=utf-8 in all 1074 Vim modelines. The reason for this is that (a) setting the encoding isn't nice, and (b) Vim 7.3 (with modeline enabled) disallows it and pops up an error whenever you open any file with it ("invalid modeline"). Also corrected five deviant modestrings: * src/ui/widget/dock.cpp and src/ui/widget/dock.h: missing colon at the end * src/ui/dialog/tile.cpp: removed gratuitous second colon at the end * src/helper/units-test.h: removed gratuitous space before a colon * share/extensions/export_gimp_palette.py: missing textwidth=99 That's my geekiest commit yet.

First GSoC node tool commit to Bazaar

Fixed copying of old settings, along with some data() vs. c_str() cleanup. Fixes bug #437929.

Migrate file MRU prefs

Fixed collapsed if/cond/body lines that blocked debugging.

Implement warning of prior errors.

Fixed broken preferences singleton and removed GUI encapsulation leakage. Fixes bug #367752.

Tentative fix for LP bug #168922: don't save prefs n crash handler

preferences.cpp: Remove an assert that causes problems with some input devices.

Change the way preferences are loaded to simplify unit testing

Merge from trunk

From trunk

Merging from trunk

Fix some bugs introduced by the preferences rewrite.

Refactored preferences handling into a new version of the Inkscape::Preferences class. Removed all use of prefs_get_string_attribute(), pref_path_get_nth_child() and create_pref() in favor of the new API. Replaced some "0 or 1" integer preferences with booleans.

bulk trailing spaces removal. consistency through MD5 of binary

Fix a typo, a vim modeline, and a wrongly indented line.

moving trunk for module inkscape